Method of making a high torque battery terminal

Details Method of making a high torque battery terminal Method of making a high torque battery terminal

1993-02-11

1994-09-27

Crane, Daniel C.

Metal deforming

With cutting

By composite tool

72357, B21D 2832, B21D 2816, B21J 512

Patent

active

053498402

ABSTRACT:
A battery terminal with high torque resistance utilizing three sided frusto-conical recesses and mating protrusions extending from the battery terminal and method of making the terminal by a cold forming process that forms a finished battery terminal from a preworked lead slug by driving one end of a punch through the slug to remove excess material and form an axial through hole, a second and third portion of the punch to close the die chamber and a fourth portion of the punch to radially expand the lead slug into a finished battery terminal. The dies for forming the battery terminal include a movable multiple-segmented die for collapsing radially inward around the slug and a frusto-conical die for forming the top portion of the battery terminal. An ejector sleeve removes the finished battery terminal after the cold forming process. A cylindrical punch with a transition zone that minimizes the local pressures in the die while elongated vent passages allow air to escape from the die to minimize formation of irregular terminals.

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Gould Drawing No. 8RD5538, "Cold Forged Positive Lead Terminal Bushing For Plastic Covers", Gould Auto. Div., St. Paul, Minn., May 3, 1974.
Gould Drawing No. 8RD5539, "Cold Forged Negative Lead Terminal Bushing For Plastic Covers", Gould Auto. Div., St. Paul, Minn., May 3, 1974.

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